mm: test PageSwapBacked in lumpy reclaim

Lumpy reclaim does well to stop at a PageAnon when there's no swap, but better is to stop at any PageSwapBacked, which includes shmem/tmpfs too. Signed-off-by: Hugh Dickins <[email protected]> Reviewed-by: KOSAKI Motohiro <[email protected]> Reviewed-by: Minchan Kim <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
franciscofranco · Jan 11, 2012 · 043bcbe · 043bcbe
1 parent faed836
commit 043bcbe
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/mm/vmscan.c b/mm/vmscan.c
@@ -1166,7 +1166,7 @@ static unsigned long isolate_lru_pages(unsigned long nr_to_scan,
 			 * anon page which don't already have a swap slot is
 			 * pointless.
 			 */
-			if (nr_swap_pages <= 0 && PageAnon(cursor_page) &&
+			if (nr_swap_pages <= 0 && PageSwapBacked(cursor_page) &&
 			    !PageSwapCache(cursor_page))
 				break;